I know it may sound like a cliche, but my advice is: Be yourself and enjoy the most your time there, without losing the focus on what's your main goal (=graduating).
Be yourself, because I think that it's the only way to make true friendships, the ones that may last forever and they can only been those kinds if you are who you are
the second one is more about "how" to have fun, living away from home with a lot of chance for parties (even every night) makes it really easy to lose the focus on your real goal, which is to get a good preparation and likely to score good marks and graduate the sooner possible